Production of yarns or threads



June 5, 1928. J 1,672,083

' C. W. PALMER PRODUCTION OF YARNS OR THREADS Filed Aug. 4, 1924 FIGJ.

IWFLNTOR CHARIES PAH-517R,

By his We,

Patented June 5, 1928.

UNITED STATES PATENroFncE.

CHARLES 'WILFRED IPALM ER, OF SPONDON, NEAR DERBY, ENGLAND, ASSIGNOR TO CELANESE CORPORATION OF AMERICA, A CORPORATION OF DELAWARE.

PRODUCTION OF YABQTS OR THREADS.

Application filed au ust 4, 1924, Serial No. 729,999, and in Great Britain September 19, 1923.

, Dry-spun artificial filaments or threads, as"

is well known, are those which are produced by extrusion, of solutions of the cellulose esters, ethers or derivatives in vaporizable solvents through fine orifices into an evaporative atmosphere, usually a current of heated air, the extrusion and formation of v the filaments generally taking place in an enclosed metier, cabinet or casing.

Hitherto compound yarns or threads such as before referred to have been manufactured by separate and independent operations yarns or threads of the cellulose ester or derivative being dry-spun and wound, with or without twisting, and being subsequently rewound and then doubled or twisted on other machines with the, other fibre or fibres to form the compound yarn or thread.

Now according to the present invention I combine the production of the filaments of a5 cellulose ester, ether or derivative and the twisting or doubling thereof with the other fibre or fibres into one operation, by continy uously associating the yarn or thread of the other fibre or fibres with the filaments of the toy cellulose ester, ether or derivative in the travel of the latter from the metler, cabinet or the' like in "which they are produced,

a twisting the associated filaments and yarn or thread together to form the compound yarn or thread and winding the compound yarn or thread as it is produced.

The twisting or doubling of such other fibre or fibres with dry-spun filaments of cellulose esters or ethers as a-single operaao tion' continuously with their production may in".pa rticular beqefiected b means of cap pinning devices, in this regard the inmay-especially be applied in conrocess or apparatus wherethe cellulose derivatives formed by extrusion in an evaporative at- Hl OSPhGIG are led on in association for threads and continuously capspun by cap spinning devices, preferably situated outside the metier, cabinet or casing in which the filaments are produced. The twisting or doubling of the dry-spun filaments with the other fibre or fibres in one operation continuously with their production may, however, be effected by other means than cap spinning and the invention is applicable generally for employment in connection with processes wherein filaments of cellulose acetate, or other esters, ethers or derivatives ofcellulose are produced'by the dry spinning or evaporative method.

It is to be understood that the invention is not confined to the doubling or twisting of a single thread, yarn or end of a textile fibre or fibres with one end or thread of the dryspun filaments, and that two or more ends of cotton yarn or other textile fibre or fibres may be associated with one or more ends of the dry-spun filaments and twisted together therewith continuously in their production.

Any suitable apparatus may be employed for the purpose of the invention, such apparatus comprising means for bringingone or more ends, threads or yarns of the other fibre or fibres into association with one or more ends of'the dry-spun filaments in the travel of the latter from the extrusion device, and means for twisting the associated filaments and fibres together and winding the resulting compound thread or 1 Preferably the said associating, twisting and winding devices are situated outside the metier, cabinet or casing in which the dryspun filaments are produced, the filaments (associated together in any desired number for the given thread) being led out of the metier, cabinet or casing to the devices for associating them with the other fibre or fibres and for twisting and winding the compound thread or yarn.

The twisting of the dry-spun filaments with the associated yarns or threads of the other textile fibre or fibres may-be in the same direction as the twist of the other textile fibre or fibres or inthe opposite direction thereto. It ispreferable however, especially in the case of employment of cotton that the twisting of the compound yarn or thread shall be in the same direction as that of the yarn associated with the dry,- spun filaments.

The invention can be applied with especial advantage for the production of compound yarns of dry-spun cellulose acetate filaments and cotton.

The accompanying drawings illustrate by way ofexample one form ofapparatus constructed in accordance with the invention, shown as applied to a' inetier of the character described in the British specification of British Cellulose and Chemical Manufacturing Go. Ltd.', and others, No. 198,023, wherein the dry-spun artificial filaments produced. in the metier are led on in association for threads and continuously twisted and wound by cap spinning devices. The acc'ompanying drawings show only so much of the metier and apparatus as is necessary to illustrate the present invention.

Fig. 1 is a diagrammatic front elevation of one form of apparatus'used.

Fig. 2 is a diagrammatic side elevation of the apparatus with the metier casing in diagrammatic section.

The fascicles of filaments, formed by extrusion of a solution of cellulose acetate or other cellulose derivative in a volatile s0lvent through nozzles or spinnerets 2, into a heated'atmosphere in the metier casing3, are led, each associated as a thread or end 1, out of the metier casing through small orifices &, and each end of filaments 1 passes forwardly over the drawing, roller 5 ack through a guide eye 6 where it is associated with the cotton or other yarn 10 to form the compound thread before returning over the drawing roller 5 to the cap spinning mechanism. Above the drawing roller is mounted a creel frame 7 extending for the lengthfof the latter and having pegs 8 to receive "the bobbins-9, cheeses or the like of cotton or other yarn to be associated with the respective filament threads or ends 1 to form the compound yarn. The cotton or other yarn 10 for each compound thread is led down through a guide eye 11, round under the drawing roller 5 and through the corresponding guide eye 6 for,'association with the thread 1 of filaments, and each compound yarn 12 thus formed travels forwardly over the drawing roller 5 and a tension roller 13 to the thread guide or balloon guide 14 of the cap spinning device and thence under the edge of the cap15 on to the bobbin 16 of the cap spinning device.

The drawing roller 5 is preferably driven at a higher surface speed than the rate of extrusion of the filaments so that the latter are drawn out in their travel to the drawmg roller. The bobbins 16 are driven and traversed in the same manner as indicated in the said British specification 198,023, and

it will be understood that the compound yarn 12 is simultaneously. twisted and wound by the action of the cap spinning devices, the bobbins or winding members of which are driven at a much higher speed than ,the rate of feed of the compound yarn.

It is to be understood that the apparatus described with reference to the drawings is given by way of example only and can be varied in wide limits within the spirit of the invention. Also that instead of cap spinning devices other twisting and winding devices may be employed for the compound yarns or threads. v

It will be seen that a great economy can be effected by the present invention, in that a doubled or compound yarn of the character referred to can be-produced in one process, whereas with previous methods it has been necessary to Ire-wind the dry-spun artificial silk and subsequently to twist it with the other fibre or fibres.

Also the product is superior, in consequence of the reduced amount of handling involved. Moreover, by twisting the other fibre or fibres in one operation continuously with the formation of the dry-spun artificial silk as described, a greater covering power can be obtained from the latter, in that it can be doubled and twisted with the other fibre without there being any twist in its individual filaments, whereas when it is spun and twisted separately the individual filaments are twisted and have less covering into lntimate association with the filaments as the latter leave the casing, and continuously twisting and winding the travelling associated threads and filaments, thereby forming acompound yarn.

2. A process for the simultaneous production of dry spun filaments and the manufacture of compound yarns composed of such dry spun filaments of cellulose derivatives and of threads of other fibers which comprises forming dry spun filaments of cellulose derivatives in a metier casing, withdrawing these filaments from the casing, feedin threads of other fibres into association with the filaments as the latter leave the casing and before they have received any twist, and continuously cap spinning the travelling associated threads and filaments, thereby forming a compound yarn.

3. A process for the simultaneous produc tion of dry spun filaments and the manu-' ciated threads and filaments, thereby forming a compound yarn. 4. A process for the simultaneous production of dry spun filaments and the manufacture of compound yarns composedof such dry spun filaments of cellulose derivatives and of threads of other fibers which comprises forming dry spun filaments of cellulose acetate in a metier casing, withdrawing these filaments directly from the casing, feeding threads of other fibres into intimate association with the filaments as the latter leave the casing and before they have received any twist, and continuously cap spinning the travelling associated threads and filaments, thereby forming a compound yarn;

5. An apparatus for the simultaneous production of dry spun filaments and the manufacture of compound yarns composed of such dry spun filaments of cellulose derivatives and of threads of other fibers which comprises means fordry spinning filaments of cellulose derivatives in ag metier casing, means for supplying threads ofother fibres, means for drawing the filaments from the casing and immediately associating said threads therewith, "and means for simultaneously twisting and winding the associated filaments and threads to form acom: pound yarn. 6. An a paratus' for the simultaneous pro duction 0 dry spun filaments and the manufacture of compound yarns composed of such dry spun filaments of cellulose derivatives and of threads of other fibers which comprises means for dry spinning filaments of cellulose derivatives in a metier casing, bobbins' for supplying threads of other fibres, a drawing roller to which the filaments are fed directly from the casing, and the threads from the bobbins, means for associating the filaments and threads, and means for simultaneously twisting and winding the associated filaments and threads to form a compound yarn.

7. An apparatus for the simultaneous production of dry spun filaments and the manufacture of compound yarns composed of such dry spun filaments of cellulose derivatives and of threads of other fibers which comprises means for dry spinning filaments of cellulose derivatives in a metier casing,

'means for supplying threads of other fibres,

means for drawing the filaments directly from the casing and associating said threads therewith, and a cap spinning device for simultaneously twisting and winding the associated filaments and threads to form acompound yarn.

8. An apparatus for the sinmltaneous production of dry spun filaments and the manu facture of compound yarns composed of such dry spun filaments of cellulose derivatives and of threads of other fibers which .Comprises means for dry spinning filaments of cellulose derivatives in a metier casing. bobbins for supplying threads of other fibres, a drawing roller to which the filaments are fed directly from the casing and the threads from the bobbins, means for associating the filaments and threads, and a cap spinning device for si'multaneouly twisting and wind ing the associated filaments and threads to form a'compound yarn.

In testimony whereof I have hereunto sub scribed my name.

CHARLES WILFRED PALMER. 

